Performance of Warm Asphalt Mixtures Made with CRM Binders
has been gaining increasing popularity in the recent years. The asphalt
industry has been experimenting with warm and cold asphalt for decades
now in order to reduce energy requirements and for environmental benefits.
Apart from the obvious advantages like reduced fuel consumption and reduced
emissions in the plant, there are several other advantages of using warm
asphalt like longer paving ‘seasons’, longer hauling distances,
reduced wear and tear of the plants, reduced ageing of binders, reduced
oxidative hardening of binders and thus reduce cracking in the pavements,
ability of opening the site to traffic sooner, etc. Until now, most of
the cold products were inferior to hot mix asphalt. However, with the
availability of several proprietary chemicals and processes to produce
warm asphalt, it is now possible to produce warm asphalt without affecting
the properties of the mix.
energy savings and the air quality improvements by using warm asphalt
are appealing, the performance of warm asphalt in the United States is
not well known. Some of the immediate concerns with warm asphalts are
properties of the warm asphalt like indirect tensile strengths, rutting,
moisture susceptibility, etc. with respect to hot mix asphalt, increased
curing times, ageing behavior of warm asphalt, compatibility with current
construction practices and equipments, compatibility with rubberized asphalt
binder, compatibility with recycled asphalt pavements, etc. While some
studies have been conducted to address some of the issues, there is still
a lot not known about warm asphalt.
objective of the research project is to investigate the performance of
warm mix asphalt as compared to hot mix asphalt. The specific objectives
of the research project include the following:
study the performance of warm mix asphalt with respect to hot mix asphalt
in terms of indirect tensile strength, rutting and resilient modulus.
• To study the rheological properties of the warm asphalt binder.
• To study the compatibility of warm asphalt technologies with rubber
modified asphalt binder.
• To study the compatibility of the warm asphalt technologies with
recycled asphalt pavement materials.
• To develop a systematic standard specification for the use of
Evaluation of Warm Asphalt Additives on Performance of CRM Binders and Mixtures
Fatigue Behavior of Warm Asphalt Mixture Containing CRM Binder